Repeat scan is needed after a week to look for interval growth of the sac and to see if there is a fetal node and cardiac activity. If there is progress then fine or else you need to do B hcg and then your gynecologist will decide about the prognosis. Sometimes because of wrong dates or late response there is lag in growth ,so no need to worry, at this point.

Cant say now ,kindly do review Usg tvs scan after 7 days Till then u can take tab folivte od Tab susten sr 200mg BD Inj HCG 5000 Iu I/M twice weekly Review after 7 days or sos